<!DOCTYPE html>
<html>
<head>
	<meta charset="UTF-8">
	<title>3-2</title>
	<style>
		thead{
			background: #0ff;
		}
		tbody{
			background: #adc;
		}
		tfoot{
			background: #ff0;
		}
		td{
			padding-right: 150px;
		}
	</style>
</head>
<body>
	<table>
		<caption>季度课时统计</caption>
		<thead>
			<th>月份</th>
			<th>课时数</th>
		</thead>
		<tbody>
			<tr>
				<td>1月</td>
				<td>80</td>
			</tr>
			<tr>
				<td>2月</td>
				<td>60</td>
			</tr>
			<tr>
				<td>3月</td>
				<td>100</td>
			</tr>
		</tbody>
		<tfoot>
			<tr>
				<td>月平均课时数</td>
				<td>80</td>
			</tr>
			<tr>
				<td>总课时数</td>
				<td>240</td>
			</tr>
		</tfoot>
	</table>
</body>
</html>